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arfgen (arfgen-1.102) [xmmsas_20211130_0941-20.0.0]

Flux loss due to pile-up

It is possible to greatly reduce the effect of pile-up by extracting data from an annulus about the source centre. The optimum inner radius to use depends on the strength of the pile-up but a typical first guess would be 20 arcseconds. The task calculates the encircled energy correction for annuli using the accurate, energy-dependent PSF described in section 5.5. The task epatplot can be used to investigate pile-up issues.

Alternatively for EPIC-pn image mode data a pile-up correction is available within rmfgen.



XMM-Newton SOC -- 2021-11-30